Machine for forming ornamental spiral grooves



(No Model.) 2 Sheets-Sheet 1.

R. W. J ORRBS. MACHINE FOR FORMING ORNAMENTAL SPIRAL enoovns.

No. 406,219; Patented July 2, 1889.

H! [H S l e a I 0 Wk x WITNESSES: v IIVVEIVTOR v 5 M BY/K ATTORNEY N PETERS. Pholol lhcgmplwr, Wmhinglvn. D. C.

(No Model.) 2 Sheets-Sheet 2. I

R. W. J-ORRES. MACHINE FOR FORMING ORNAMENTAL SPIRAL GROOVES.

No. 406,219. Patented July 2, 1889.

M5 2 ATTOH/VE UNITED STATES PATENT OFFICE.

RALPH \VM. JORRES, OF THOMASTON, CONNECTICUT.

MACHINE FOR FORMING ORNAMENTAL SPIRAL GROOVES.

SPECIFICATION forming part of Letters Patent No. 406,219, dated July 2, 1889.

h Application filed February 6, 1889- Serial No. 298,861. (No model.)

To aZZ whom it may concern.-

Be it known that I, RALPH WILLIAM J on- RES, of Thomaston, in the county of Litchfield and State of Connecticut, have invented a new and Improved Machine for Forming Ornamental Spiral Grooves, of which the following is a full, clear, and exact description.

The object of my invention is to provide a machine or apparatus by means of which a cutting or graying tool will be held and guided so as to form a spiral groove in the surface of a panel; and to the end named the invention consists, essentially, of a revoluble shaft, a tool carrier, and connections between the shaft and the tool-carrier, whereby, as the shaft is revolved, the carrier is moved longitudinally over the upper end of the shaft, all as will be hereinafter more fully described, and specifically pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similarfigures and letters of reference indicate corresponding parts in all the views.

Figure 1 is a plan View of my improved scroll-forming apparatus. Fig. 2 is a side view thereof, parts being broken away. Fig. 3 is an end view, parts being broken away. Fig. 4 is an enlarged detail view illustrating the connection between one of the end levers and its turn-buckle. Fig. 5 is a central longitudinal sectional view of the upper portion of the shaft, the table, and the toolcarrier. Fig. 6 is a longitudinal sectional view of one of the apertured adjustable blocks through which the tool is inserted. Fig. 7 is a still further enlarged perspective view of the same; and Fig. 8 is a plan view of a panel, representing it as it appears after having been operated upon by my improved scroll-forming apparatus.

In the drawings, 10 represents a base-plate, to which there are secured standards 11, which carry a longitudinal plank 12, upon which there is secured a table 13. At the center of the base 10 there is stepped a vertical shaft 14, which extends upward through apertures formed in the plank 12 and the table 13, the upper end of this shaft being provided with spurs 15.

Above the table 13, I mount a tool-carrying strip 16, said strip being supported at each pins 18, which pass through brackets 19, that r are carried by the plank 12; and in order that the fulcrums of the levers may be adjusted as required I form said brackets with two or more apertures, whereby the levers may be adjusted, as j ust set forth.

Near the lower ends of the levers 17 there is formed a series of apertures b, the inner faces of the levers being longitudinally grooved, as shown at c, to receive the apertured heads 20 and 20 (see Fig. 4) of turnbuckle screws 21 and 21, the heads being held in place by pins 7c, the turn-buck1es22 and 22" being connected by cords or strips 23 and 23 with the vertical shaft 14,'sa1d cords being wound in opposite directions upon the shaft.

The tool-carrying strip 16 is formed with a central longitudinal slot that 1s rabbeted to receive the end flanges d of apertured toolcarrying blocks 30, which blocks are held to place by plates 6, that are secured to the strip 16 by screws, as shown in the drawings, the arrangement being such that the blocks 30 may be adjusted toward or from the center of the strip 16 and there bound to place.

In operation the panel to be ornamented is placed upon the table 13, the spurs 10 of the shaft 14 being forced into the under side of the panel. A tool is then inserted through the aperture f of one of the blocks 30 and the panel is turned, and as the panel 18 so turned the shaft 14 will be rotated, and one of the cords 23 or 23 will be wound upon the shaft, while the other cord will be unwound, the cord which is wound upon the shaft drawing upon its lever 17 whereby the lower end of the lever will be carried toward the shaft 14. We will suppose that the cord upon the right (23 in Fig. 2) is being drawn upon, 1I1 whleh case the lever 17 upon the right would be drawn in the direction of the arrow shown 1n connection therewith, and the strip 16 would consequently be carriedin the direction of its arrow; but if an opposite motion should be imparted to the panel the cord upon the left (23) would be. drawn upon and an opposite motion would be imparted to the several movable members of the apparatus.

To regulate the range of motion of the levers, I provide segmental racks 40, that are formed with a series of apertures 71, adapted o receive limit-pins 2 which may be placed as desired, thus limiting the throw of the levers.

The pitch of the spiral groove upon the panel may be regulated by shifting the connection between the turn-buckles and the lovers, as will be readily understood.

Such a machine as the one above described is exceedingly rapid and accurate in operation.

The machine is intended, primarily, for ornamentin g furniture, clock-cases, and other wood-work, but may be used for metal-work also.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with a revoluble shaft provided with spurs or retaining attachments, of a tool-carrier mounted above the shaft, levers upon which the tool-carrier is supported, cords or strips wound upon the shaft, and connections between said cords and the levers, substantially as described.

2. The combination, with a shaft provided with prongs or projections 15, of a tool-carrying strip mounted above the shaft, levers to which the tool-carryin g strip is connected, connections between the levers and the shaft, and apertured tool-carrying blocks carried by the strip, substantially as described.

3. The combination, with a shaft provided with prongs or projections, of a tool-carrying strip mounted above the shaft, pivotallymounted levers to which the tool-carrying strip is pivoted, cords or strips wound in opposite directions upon the shaft, and adjnstable connections bet-ween the cords and the levers, substantially as described.

l. The combination, with a shaft provided with prongs or projections, of a tool-carryin g strip mounted above the shaft, pivotallymounted levers to which the tool-carrying strip is pivotally connected, cords wound upon the shaft, connections between the cords and the levers, segmental racks, and limit pins or stops carried by said racks, substantially as described.

RALPH M. .TORRES.

\Vitnesses:

ERNEST MILLER, CHARLES \V. LAUBIN. 

